P27DC

Symptoms

• Hard gear shifts
• Gear slip
• Switching delays
• Uneven transmission operation
• Check Engine Light Illuminates

Causes

• Problems with the solenoid electrical circuit (open, short circuit)
• Malfunction of the pressure control solenoid itself
• Poor contact in solenoid connector
• Solenoid dirty or worn
• Transmission Control Module (TCM) Problems

How to Fix

1. Check the electrical circuit of the solenoid for breaks and short circuits
2. Inspect the connectors and contacts of the solenoid
3. Check solenoid resistance (compare with specifications)
4. Replace pressure control solenoid if necessary
5. Clean the system of contaminants and replace the transmission fluid

Related codes

Error P27DC by Vehicle Brand